//
// Created by 123 on 2024/12/31.
//
#include "iostream"
using namespace std;

class Person{
public:
    Person(int age){
        this->mage = age;
    }
    void showClassName(){
        cout << "i am person class";
    }
    void showPersonAge(){
//        if(this == NULL){
//            return;
//        }
        cout << mage << endl;
    }

public:
    int mage;
};

void test1(){
    Person* p = NULL;
    p->showClassName();
    p->showPersonAge();
}

int main067(){
    test1();

    return 0;
}